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| author | Todd Poynor <tpoynor@mvista.com> | 2005-10-28 16:25:01 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2005-10-28 16:25:01 +0100 |
| commit | 80a18573cea2e6d8e95abe4d42bfc5f97761999a (patch) | |
| tree | 169773f6b106c22e9df10d14a14f538299915b51 /arch/arm/mach-pxa/sleep.S | |
| parent | 917f68f8163eb877a6d71c5b446ee236645c2944 (diff) | |
| download | kernel_samsung_smdk4412-80a18573cea2e6d8e95abe4d42bfc5f97761999a.zip kernel_samsung_smdk4412-80a18573cea2e6d8e95abe4d42bfc5f97761999a.tar.gz kernel_samsung_smdk4412-80a18573cea2e6d8e95abe4d42bfc5f97761999a.tar.bz2 | |
[ARM] 2787/2: PXA27x low power modes support
Patch from Todd Poynor
Add symbols for PXA2xx PWRMODE register M field that selects low-power
mode, replace unadorned constants. Honor power mode parameter of
pxa_cpu_suspend(mode), no longer force to 3 (sleep). Full Deep Sleep
low-power mode support for PXA27x is pending generic PM interfaces to
select more than 2 suspend-to-RAM-style power modes, but this is
expected soon. This can be hardcoded in the meantime by replacing the
pxa_cpu_suspend() parameter value. From David Burrage and Todd Poynor.
Try #2 removes one of the register copies and moves the code to save the
pxa_cpu_suspend parameter to immediately surround the call that requires
the parameter value be preserved.
Signed-off-by: Todd Poynor <tpoynor@mvista.com>
Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mach-pxa/sleep.S')
| -rw-r--r-- | arch/arm/mach-pxa/sleep.S | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/arch/arm/mach-pxa/sleep.S b/arch/arm/mach-pxa/sleep.S index 5786cca..c986268 100644 --- a/arch/arm/mach-pxa/sleep.S +++ b/arch/arm/mach-pxa/sleep.S @@ -28,7 +28,9 @@ /* * pxa_cpu_suspend() * - * Forces CPU into sleep state + * Forces CPU into sleep state. + * + * r0 = value for PWRMODE M field for desired sleep state */ ENTRY(pxa_cpu_suspend) @@ -53,6 +55,7 @@ ENTRY(pxa_cpu_suspend) mov r10, sp stmfd sp!, {r3 - r10} + mov r5, r0 @ save sleep mode @ preserve phys address of stack mov r0, sp bl sleep_phys_sp @@ -66,7 +69,7 @@ ENTRY(pxa_cpu_suspend) @ (also workaround for sighting 28071) @ prepare value for sleep mode - mov r1, #3 @ sleep mode + mov r1, r5 @ sleep mode @ prepare pointer to physical address 0 (virtual mapping in generic.c) mov r2, #UNCACHED_PHYS_0 |